For driving a current of 3 A for 5 minutes is an electric circuit, 900 J of work is to be done. Find the emf of the source in the circuit.

For driving a current of 2 A for 6 minutes in a circuit, 1000 J of work is to be done. The e.m.f. of the source in the circuit is

For driving a current of 2 A for 6 minutes in a circuit, 1000 J of work is to be done. The e.m.f. of the source in the circuit is

For driving current of 2A for 6 min in a circuit, 1,000 J of work is to be done. The e.m.f. of the source is

Find the electric current in the following circuit:

During short-circuiting, the current flowing in the electrical circuit

A dry cell of internal resistance 0.1 ohm drives current of 20 A when the cell is not short circuited. Find the emf of the cell. Find the terminal p.d. when the cell is open circuited.